Potassium ion batteries: Recent advancements in anodic, cathodic, and electrolytic materials

Theoretical investigation of Janus Ti2BST (T = O, Se) monolayers as anode materials for Na/K-ion batteries

“…Recently, NIBs and KIBs with a similar charging mechanism to LIBs have been extensively studied as potential candidates to replace LIBs due to their abundant resources in the Earth's crust (23 600 mg kg −1 for Na, 20 900 mg kg −1 for K), low cost, and high safety. 1,2 However, since the ionic radius of Na + /K + (1.02/1.38 Å) is larger than that of Li + (0.76 Å), most anode materials in LIBs are unsuitable for NIBs or KIBs. For example, graphite, which is commercially used as an anode material in LIBs, cannot be used in NIBs.…”